Why it works: Apple and lemon are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 7,551 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Apple Jelly
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Pare, core, and slice the apples.
Cook the fruit
Put the apples in a jar with sugar, lemon rind, and juice.
Set the jar in a tin of water in the oven at 350°F (175°C) until the fruit is tender.
Replenish the water as it evaporates.
Finish
Transfer the mixture to a preserving pan and boil for 20 to 30 minutes until done.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Apple + lemontop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Apple + sugartop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
Apple and sugar barely smell alike, yet cooks put them together in 16,478 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Baking apples
- Provide the pectin and body that help the jelly set.
- Sugar
- Sweetens the jelly and helps it set and keep.
- Lemon juice
- Adds acidity that supports pectin setting and brightens the flavour.
- Lemon rind
- Adds aromatic lemon oil and extra pectin to the mixture.
The step that matters
Boiling in the preserving pan. Boiling concentrates the sugar and fruit until the pectin and acid can form a gel. Stopping too early leaves a runny jelly, while boiling too long can make it stiff or dull in flavour.
Swap the lemon
How well each one fits the dish's main ingredients (apple, sugar):
- Pearfits better
- Vanillafits better
- Apricotfits better
- Lemonthe original
Fit is the average pairing score against apple, sugar. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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